Safety features for continuous motion therapy system

Details Safety features for continuous motion therapy system Safety features for continuous motion therapy system

1987-03-10

1989-01-17

Picard, Leo P.

Surgery

Truss

Perineal

128423W, A61H 102

Patent

active

047981970

ABSTRACT:
Safety features for a continuous motion therapy system of the type including a carriage for supporting a patient's limb, a drive unit for driving the carriage through a range of reciprocal angular movement, first and second channel neuromuscular stimulators for applying electrical stimulation to muscles of a patient's limb, and a controller for controlling the drive unit and stimulators. Both stimulator channels must be turned OFF after the controller is powered up before either stimulator channel will operate. The drive unit is enclosed by a cover. When pressure on the cover is sensed, the controller stops and reverses the direction of the carriage. The drive unit includes a drive motor which is coupled to the carriage by a linkage. Limit switches provide limit signals when the linkage reaches predetermined limit positions. In response, the controller stops and reverses direction of the carriage. A remote patient controller which is coupled to the controller by a multiconductor cable permits the patient to control motion of the carriage from a remote location. Should the cable be disconnected from the controller, or should any lead therein become open or short circuited, the controller causes motion of the carriage to stop either immediately or after the remote patient controller is again actuated.

REFERENCES:
patent: 4509509 (1985-04-01), Bouvet et al.
patent: 4520827 (1985-06-01), Wright et al.
patent: 4549534 (1985-10-01), Zagorski et al.
patent: 4558692 (1985-12-01), Greiner
patent: 4566440 (1986-01-01), Berner et al.
patent: 4621620 (1986-11-01), Anderson

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